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Round|Natural|GIA

1.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 7553158400

Certificate GIA 7553158400

Diamond specifications and retailer prices

From £5,483 GBP
$7,358 USD
As of November 1, 2026
Save £6,613 GBP (55%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £12,096 GBP at NZ Jewellers · As of November 2, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7553158400. Listed at 24 retailers as of November 1, 2026, with prices from £5,483 to £12,096, a £6,613 spread on the same certified stone. NZ Jewellers lists it at £12,096. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 7553158400
Dimensions7.31 × 7.28 × 4.56 mm
L/W Ratio1.00
Girdle conditionFaceted
Top View
7.31 mm7.28 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 7553158400
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £12,096 GBP|Low: £5,274 GBP|High: £12,096 GBP|Avg: £7,674 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 8£5,801 GBP
Retailer 3£6,048 GBP
Retailer 10£6,552 GBP
Retailer 2£6,651 GBP
Retailer 9£6,652 GBP
Retailer 7£6,681 GBP
Retailer 4£7,483 GBP
Retailer 11£7,560 GBP
Retailer 6£8,885 GBP
Retailer 5£10,079 GBP
NZ Jewellers£12,096 GBP

43 data points across 11 retailers

24 retailers£5,483 GBP to £12,096 GBP

B+
Cheapest Retailer
-
£5,483 GBP
$7,358 USD
B+
Retailer 2
-
£5,649 GBP
A$11,662 AUD
View
B+
Retailer 3
-
£5,663 GBP
$7,599 USD
View
B+
Retailer 4
-
£5,801 GBP
$7,785 USD
View
Final sale: no returns
B+
Retailer 5
-
£5,824 GBP
$7,816 USD
View
B+
Retailer 6
-
£5,943 GBP
CA$11,077 CAD
View
B+
Retailer 7
-
£6,017 GBP
$8,075 USD
View
B+
Retailer 8
-
£6,048 GBP
$8,116 USD
View
B+
Retailer 9
-
£6,552 GBP
$8,792 USD
View
B+
Retailer 10
-
£6,651 GBP
View
B
Retailer 11
-
£6,652 GBP
$8,927 USD
View
Retailer 12
-
£6,681 GBP
A$13,794 AUD
View
Price last confirmed 9 days ago
B
Retailer 13
-
£6,711 GBP
$9,006 USD
View
B+
Retailer 14
-
£6,950 GBP
$9,327 USD
View
B+
Retailer 15
-
£7,169 GBP
$9,620 USD
View
B+
Retailer 16
-
£7,169 GBP
$9,620 USD
View
B
Retailer 17
-
£7,407 GBP
$9,940 USD
View
B+
Retailer 18
-
£7,483 GBP
€9,564 EUR
View
B
Retailer 19
-
£7,560 GBP
$10,145 USD
View
B
Retailer 20
-
£7,717 GBP
$10,356 USD
View
Retailer 21
-
£7,962 GBP
$10,685 USD
View
Price last confirmed 10 days ago
B
Retailer 22
-
£8,885 GBP
ZAR 192,615 ZAR
View
B
Retailer 23
-
£10,079 GBP
View
Most Expensive
B
NZ Jewellers
eb3c1a88-f45c-4c03-a97a-4d4757043811 · Nov 2
£12,096 GBP
$16,232 USD
View
23 more retailers have this diamond
Prices start from £5,483 GBPSave up to £6,613 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
1.51ct Round
£5,483 GBP